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Climate Moisture Indices for the World Water Development Report II
Entry ID: UNH_WWRDII_CLIMMOIS

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Summary
Abstract: Global field of long-term average annual climate moisture index (CMI,
Willmott and Feddema, 1992) computed using the ratio of annual
precipitation (P) to annual potential evapotranspiration, (PET),
specifically CMI = (P/PET) when P < PET and CMI = 1 - (PET/P) when P
>= PET. The indicator ranges from to +1, with wet climates showing
positive CMI, and dry climates negative CMI. PET was estimated using
the physically-based function of Shuttleworth and Wallace (1985),
which is a modification of the standard Penman-Monteith PET equation.
Long-term average precipitation was computed from Mitchell et
al. (2003). Coefficient of variability (CV) is computed as the annual
standard deviation divided by long-term annual mean.
Related URL
Link: GET DATA
Description: Access to climate moisture data

Link: VIEW RELATED INFORMATION
Description: Climate moisture index documentation
Geographic Coverage
(Click for Interactive Map)
Spatial coordinates   
  N: 90.0   S: -90.0   E: 180.0   W: -180.0

Data Set Citation
Dataset Originator/Creator: Water Systems Analysis Group
Dataset Title: Climate Moisture Indices
Dataset Series Name: World Water Development Report II
Dataset Release Place: Universty of New Hampshire
Online Resource: http://wwdrii.sr.unh.edu/sourcematerial/CMI_metadata.html
Temporal Coverage
Start Date: 1901-01-01
Stop Date: 2000-12-31
Location Keywords
Data Resolution
Latitude Resolution: 30 min
Longitude Resolution: 30 min
Horizontal Resolution Range: 1 km - < 10 km or approximately .01 degree - < .09 degree
Temporal Resolution: annual mean
Temporal Resolution Range: Annual
Science Keywords
ISO Topic Category
Project
Ancillary Keywords
Data Set Progress
COMPLETE
Originating Center
UNH
Data Center
Water Systems Analysis Group, Complex Systems Research Center, Institute for the Study of Earth, Oceans, and Space, University of New Hampshire Supplemental Info
Data Center URL: http://www.wsag.unh.edu/

Data Center Personnel
Name: CHARLES J. VOROSMARTY
Phone: (603) 862-1792
Fax: (603) 862-0188
Email: charles.vorosmarty at unh.edu
Contact Address:
Water Systems Analysis Group
Complex Systems Research Center
Institute for the Study of Earth, Oceans, and Space
University of New Hampshire
Morse Hall, 39 College Road
City: DURHAM
Province or State: NH
Postal Code: 03824
Country: USA
Distribution
Distribution Media: online
Distribution Format: JPEG, ASCII, ARC
Fees: none
Personnel
CHARLES J. VOROSMARTY
Role: INVESTIGATOR
Phone: (603) 862-1792
Fax: (603) 862-0188
Email: charles.vorosmarty at unh.edu
Contact Address:
Water Systems Analysis Group
Complex Systems Research Center
Institute for the Study of Earth, Oceans, and Space
University of New Hampshire
Morse Hall, 39 College Road
City: DURHAM
Province or State: NH
Postal Code: 03824
Country: USA
Publications/References
Fekete, B. M., C. J. Vorosmarty, and W. Grabs. 2002. High-resolution
fields of global runoff combining river discharge and simulated water
balances, Global Biogeochemical Cycles, 16 (3): 15-1 to 15-10.

Mitchell, T.D., Carter, T.R., Jones, P.D., Hulme,M., New, M., 2004. A
comprehensive set of high resolution grids of monthly climate for
Europe and the globe: the observed record (1901-2000) and 16 scenarios
(2001-2100). Tyndall Centre Working Paper 55.

Shuttleworth, W. J. and J. S. Wallace. 1985. Evaporation from sparse
crops: an energy combination theory, Quarterly J. R. Meteorol. Soc.,
111: 839-855.

Willmott, C.J., and J.J. Feddema. 1992. A more rational climatic
moisture index. Prof. Geographer 44: 84-87.
Creation and Review Dates
DIF Creation Date: 2005-12-07
Last DIF Revision Date: 2005-12-12

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